I bought an Boondocker '03 Rx-1 recently and on my second ride it threw the #3 rod out of the case. I was only running 12-14lbs boost with 30% 110 and 6500ft in elevation with 11.5-12 afr's. And its got a .063 headshim in it. The guy I bought it from had bought the sled as a box of parts and had to put the motor together. He put it together and put the turbo on it at 1000 miles and it only has 1800 miles on it now.
I've been doing lots of reading and it sounds like #3 is usually the rod that lets loose on these motors. It was full of oil and only had 250 miles on an oil change with semi synthetic 0w-30 yamalube. It blew at about 1/4 throttle and made no noise or ticking or vibration prior to that. I'm guessing that maybe the rod bearings had gotten switched around when it was reinstalled, but why is it always #3?
I've been doing lots of reading and it sounds like #3 is usually the rod that lets loose on these motors. It was full of oil and only had 250 miles on an oil change with semi synthetic 0w-30 yamalube. It blew at about 1/4 throttle and made no noise or ticking or vibration prior to that. I'm guessing that maybe the rod bearings had gotten switched around when it was reinstalled, but why is it always #3?